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Trav



Member Since: 27 Aug 2016
Location: Aberdeen
Posts: 167

Scotland 2007 Freelander 2 TD4 HSE Lux Manual Rimini Red
Drill bits.

Today I was trying to drill out broken studs in an exhaust on a shogun. I was using a dormer hsco (combat) drill bit using cutting fluid and working my way up through the sizes in 0.5mm increments and was bluntening them like it was going out of fashion.

Anybody got a good suggestions for high quality drill bits for working with tempered, stainless and high tensile steel? I ask as £40 in drill bits to get 2 holes bored just doesn't seem feasible. Cheaper than a new cat but still. Laughing Laughing

Post #323488 16th May 2017 8:34 pm
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Chuckalicious



Member Since: 23 May 2014
Location: Midlothian
Posts: 1698

United Kingdom 2014 Freelander 2 SD4 SE Auto Santorini Black

I get mine from ukdrills.com

Only used wood and masonry ones but prices are very reasonable. Learned to drive in 2011.
Bought a Micra - great little car
"Upgraded" to Kia Sportage - hated it
Proper upgrade to FL2 TD4 GS 60 reg Facelift - tailgate paint issues, fuel gauge rewire, transfer box failure at 36k miles, clutch at 60k
Reconditioned diff at 70k ish
Sold at 84k and now on a DS. Terribly unreliable.
Sold DS for a 2021 Mitsubishi Outlander PHEV. Fingers crossed....
Sold Outlander for a 2014 SD4 SE Tech because I’m mental

Post #323493 16th May 2017 9:04 pm
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Lightwater



Member Since: 21 Aug 2014
Location: Sydney Northern Beaches
Posts: 4704

Ukraine 2013 Freelander 2 2.0T SE Auto Fuji White

Good drill bits are expensive. Drill at low speed and keep cooling the drill bit and stud, plus the cutting fluid as you have been doing, & wear safety glasses! Procrastination, mankind's greatest labour saving device!

Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18

Post #323495 16th May 2017 9:22 pm
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Dartman the one



Member Since: 04 Apr 2013
Location: Seville, Spain
Posts: 1650

England 

If you keep blunting them then sharpen them, any angle grinder with a grinding disc will do of you don't have a bench grinder, these days most drills work better when sharpened even new ones. my PC is slightly to the right of Genghis
2012 HSE SD4 In Orkney Grey now gone, best car ever.

Post #323503 17th May 2017 4:28 am
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chicken george



Member Since: 05 Dec 2007
Location: N. Yorks
Posts: 13283

United Kingdom 2008 Freelander 2 TD4 XS Manual Santorini Black

I have a fairbucket full of blunt bits,, might invest in one of these and spend a rainy day sorting them
the drill doctor is allegedly the best but double the money

http://www.screwfix.com/p/titan-hss-drill-...230v/1566H

https://www.amazon.co.uk/Sealey-SMS2008-Drill-Sharpener-Mounting At work
At home

"I can't always believe facts I read on the web" - Charles Dickens

winner by default of the tractor vs caravan race

Post #323510 17th May 2017 7:28 am
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Trav



Member Since: 27 Aug 2016
Location: Aberdeen
Posts: 167

Scotland 2007 Freelander 2 TD4 HSE Lux Manual Rimini Red

I Do have a devise for sharpening them in a bench grinder! Probably not as good as the drill doctor would be but it does work. The problem I was having was brand new out of the packaging or freshly sharpened they just wouldn't even scratch the material I was going into as it was that hard. Was wondering if anybody had a recommended type or manufacture of bit they prefer. I was using dormer bit always been led to believe they was a good make?

Post #323518 17th May 2017 8:24 am
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Dartman the one



Member Since: 04 Apr 2013
Location: Seville, Spain
Posts: 1650

England 

If the metal is that hard you only have one option, heat it to red heat and bury it in hot sand and allow to cool for a couple of days my PC is slightly to the right of Genghis
2012 HSE SD4 In Orkney Grey now gone, best car ever.

Post #323526 17th May 2017 9:15 am
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chicken george



Member Since: 05 Dec 2007
Location: N. Yorks
Posts: 13283

United Kingdom 2008 Freelander 2 TD4 XS Manual Santorini Black

i went on a training course re drill sharpening, altering the rest height on bench grinder holding at correct angle. sometimes I do a wonderful job most times I make it worse.

My Dad still moans about wasting money sending me on the course 30 years ago everytime he picks a blunt bit , yet if I buy a new set he moans, 'you dont need them youve been on a course' At work
At home

"I can't always believe facts I read on the web" - Charles Dickens

winner by default of the tractor vs caravan race

Post #323527 17th May 2017 9:53 am
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Dartman the one



Member Since: 04 Apr 2013
Location: Seville, Spain
Posts: 1650

England 

You can get away with some pretty crude angles when sharpening drills, the big problems are the angle across the tip being nearer to 180deg rather than 90 or less and the cutting edge is lower than the trailing edge, providing the drill cuts away from the cutting edge it will drill. Generally it's pretty near when the swarfe comes off in nice spirals. Very Happy my PC is slightly to the right of Genghis
2012 HSE SD4 In Orkney Grey now gone, best car ever.

Post #323532 17th May 2017 3:29 pm
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dunkley201



Member Since: 09 Jul 2011
Location: Lincolnshire
Posts: 2739

United Kingdom 2010 Freelander 2 TD4 HSE Auto Stornoway Grey

I recall "back in the day" for really hard jobs, instead of Dormer HSS bits we used "Cobalt" bits. They were quite short but "well 'ard".

Bob 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Post #323547 17th May 2017 7:26 pm
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Trav



Member Since: 27 Aug 2016
Location: Aberdeen
Posts: 167

Scotland 2007 Freelander 2 TD4 HSE Lux Manual Rimini Red

It was a Cobalt bit clearly just the exhaust studs had been tempered over the past 10 years of use. Just wanted to know if any one had any bright ideas for future reference. Thanks for everyone's input.

Post #323548 17th May 2017 7:48 pm
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Lightwater



Member Since: 21 Aug 2014
Location: Sydney Northern Beaches
Posts: 4704

Ukraine 2013 Freelander 2 2.0T SE Auto Fuji White

Recently bought a 1/2 cobalt bit, cost an arm & 2 legs! https://www.bunnings.com.au/sutton-tools-2...t_p6350492 Procrastination, mankind's greatest labour saving device!

Acoustic insulation ARB TPMS 3xARB air compressors After cooler Air tank On-board OCD pressure air/water cleaning Additional 50L fuel Carpet in doors ABE 2x1kg Waeco 28L modified fridge Battery 4x26ah Solar 120w Victron MPPT 100/20 DC-DC 18amps 175amp jumper plug Awning 6x255/60R18

Post #323578 18th May 2017 1:25 pm
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dunkley201



Member Since: 09 Jul 2011
Location: Lincolnshire
Posts: 2739

United Kingdom 2010 Freelander 2 TD4 HSE Auto Stornoway Grey

Wow! When I last used them, the Queen was paying for them! Whistle 10MY (Sept 09) TD4 HSE Auto in Stornoway Grey (Now Gone)

08 FL2 TD4 SE Manual in Rimini Red (Now Gone)

Post #323579 18th May 2017 3:51 pm
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